Plug connector for telecommunications and data technology
The invention relates to a plug connector (1) for telecommunications and data technology, for connection of a balanced data cable, with the plug connector (1) having an electrically insulating plug connector housing (2) as well as first contacts (8) and second contacts (7), with the first contacts making contact with a plurality of conductor pairs in a balanced data cable, and with the second contacts being able to make electrical contact with the contacts of a complementary plug connector, with in each case two first contacts being associated with one conductor pair and with each first contact being associated with one second contact, with the first contacts being galvanically connected to their associated second contacts, and with all the conductor pairs each being associated with a common-mode filter arrangement.
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This application is a National Stage Application of PCT/EP2007/006363, filed Jul. 18, 2007, which claims benefit of Ser. No. 10 2006 036 459.7, filed Aug. 4, 2006 in Germany and which application(s) are incorporated herein by reference. To the extent appropriate, a claim of priority is made to each of the above disclosed applications.
The invention relates to a plug-in connector for telecommunications and data technology.
Such plug-in connectors are, for example, RJ45 sockets or plugs, such a generic RJ45 socket being described in WO 02/15339.
Furthermore, DE 298 19 314 U1 has disclosed a socket-type plug-in connector having a dielectric plug-in connector housing and contacts arranged in the plug-in connector housing for the purpose of producing a connection with the contacts of an associated plug-in connector which has been inserted into an insertion opening in the plug-in connector housing, and having external connection contacts for the purpose of producing an electrical connection with the socket-type plug-in connector, having an arrangement for the purpose of DC-decoupling the contacts for the associated plug-in connector from the external connection contacts and having a filter device, an element being provided which can be inserted essentially completely into the plug-in connector housing and holds both the contacts for the associated plug-in connector and the external connection contacts, and in which both the arrangement for the DC-decoupling and the filter device are arranged. The arrangement for the DC-decoupling and the filter device comprise inductances which are formed by coils having a ferrite ring core, whose center axes are aligned in each case parallel to one another. Transformers for the DC-decoupling act as a bandpass filter, which is disadvantageous in particular in the case of broadband transmissions in accordance with CAT6 and 10 gigabit/s Ethernet applications.
In the case of CAT6 or 10 gigabit/s Ethernet applications, in addition to the known crosstalk effects within a plug-in connector, such as NEXT (near end crosstalk) and FEXT (far end crosstalk), there is an increased influence of the so-called ANEXT (alien near end crosstalk) or AFEXT (alien far end crosstalk) in adjacent plug-in connectors. The influence of the ANEXT or AFEXT increases severely at higher signal transmission rates. This AXT (alien crosstalk) comprises the direct AXT between the plug-in connectors and the indirect AXT via the differential mode to common mode conversion of the plug-in connector, the common-mode coupling between the connected cables and the common mode to differential mode conversion in the plug-in connector which is subjected to the interference.
The invention is therefore based on the technical problem of providing a plug-in connector for telecommunications and data technology, by means of which the influence of the AXT is reduced at high transmission rates of CAT6 or 10 gigabit/s Ethernet.
In this regard, in each case one common-mode filter arrangement is assigned to all of the core pairs. An interfering common-mode signal is thereby attenuated in pairs, with the result that this attenuated common-mode component does not lead to AXT in an adjacent plug-in connector. At the same time, the common-mode filter arrangement also attenuates injected common-mode signals from other plug-in connectors.
In one preferred embodiment, the common-mode filter arrangement is in the form of a common-mode inductor, which is arranged on a printed circuit board for the first and second contacts, the common-mode inductor preferably being in the form of an SMD component, which allows for a compact design. The common-mode inductor is in this case preferably electrically connected between the first and second contacts.
As an alternative or in addition, the common-mode arrangement can be in the form of a ferrite sleeve, a dedicated ferrite sleeve being assigned to each core pair, whereas an individual ferrite sleeve would have virtually no effect for the entire cable. The reason for this is the fact that the common-mode signals on the different core pairs do not necessarily have the same direction. The common-mode interference therefore needs to be reduced separately for each core pair.
Various embodiments are now possible for connecting the ferrite sleeves to the plug-in connector or the plug-in connector housing.
In one embodiment, the ferrite sleeves are in the form of a separate component and are fixed, for example latched or adhesively bonded, to the plug-in connector housing. In addition it is also possible to provide a separate ferrite sleeve holder which holds the ferrite sleeves, the ferrite sleeve holder itself being held by the housing of the plug-in connector or the cores. In this case, the ferrite sleeve holder is preferably designed such that the individual ferrite sleeves do not come into contact with one another and therefore magnetic couplings are avoided. In addition to the actual plug-in connector housing, the ferrite sleeves can also be arranged on a cable manager of the plug-in connector.
In one alternative embodiment, the plug-in connector housing and/or a retainer and/or a cable manager consists at least partially of a ferrite material or contains ferrite material. It is thus possible, for example, for a cable manager to consist completely of a ferrite material, the core pairs then being passed through said cable manager in their respectively associated segment. As an alternative, the ferrite sleeves can be encapsulated by injection molding in the plug-in connector housing. It is also possible to admix ferrite powder to the plastic injection molding material.
A common-mode filter arrangement preferably takes place in the case of a plug-in connection both on the plug side and on the socket side, but the respective design of the common-mode filter arrangement may be different.
The invention will be explained in more detail below with reference to a preferred exemplary embodiment. In the figures:
As can be seen in
- 1 Plug-in connector
- 2 Plug-in connector housing
- 3 Printed circuit board
- 4 Retainer
- 5 Cable manager
- 6 Shielding plate
- 7 RF contacts
- 8 Insulation displacement contacts
- 9 Cylinder pins
- 10 Latching tabs
- 11 Openings
- 12 Latching hooks
- 14 Cylindrical attachment
- 17 Guide cross
- 20 Conductor track
- 21 Conductor track
- 22 SMD component
- 23 Common-mode inductor
- 24 Ferrite ring
- 25 Conductor track
- 26 Conductor track
- 30 RF contacts
- 31 Upper part
- 32 Lower part
- 33 Latching hooks
- 34 Latching openings
- 35 Cable manager
- 36 Ferrite sleeve holder
- 37 Ferrite sleeve
- 38 Front part
- 39 Rear part
- 40 Base body
- 41 Bays
- 42 Cylindrical attachments
- 43 Clamping protrusions
- 44 Journals
- 45 Openings
- 46 Holding journals
Claims
1. A plug-in connector for telecommunications and data technology for the purpose of connecting a symmetrical data cable, the plug-in connector comprising:
- an electrically insulating plug-in connector housing, and
- first contacts and second contacts positioned in the connector housing, the first contacts being configured to electrically connect to a plurality of core pairs of a symmetrical data cable, the second contacts being configured to electrically connect to contacts of a complementary plug-in connector,
- wherein two of the first contacts correspond to each core pair, and one second contact corresponds to each first contact, the first contacts being DC-connected to their corresponding second contacts,
- wherein one of a plurality of common-mode filter arrangements corresponds to each of the core pairs, wherein the common-mode filter arrangements are in the form of ferrite sleeves, wherein the ferrite sleeves are configured for each core pair to pass through the corresponding ferrite sleeve,
- wherein the plug-in connector housing includes an upper part that is configured to latch to a lower part,
- wherein the plug-in connector housing also includes a cable manager that is configured to guide the core pairs to the first and second contacts.
2. The plug-in connector as claimed in claim 1, wherein the ferrite sleeves are fixed as separate components to the plug-in connector housing.
3. The plug-in connector as claimed in claim 1, wherein the plug-in connector housing consists at least partially of a ferrite material or contains ferrite material.
4. The plug-in connector as claimed in claim 2, wherein the ferrite sleeves are fixed to a ferrite sleeve holder held within the plug-in connector housing.
5. The plug-in connector as claimed in claim 4, wherein the holder is configured to hold four ferrite sleeves.
6. The plug-in connector as claimed in claim 4, wherein the ferrite sleeves held by the holder do not come into contact with each other.
7. The plug-in connector as claimed in claim 4, wherein the holder is held between the upper and lower parts.
8. The plug-in connector as claimed in claim 4, wherein the holder includes a front part and a rear part.
9. The plug-in connector as claimed in claim 8, wherein the front part of the holder includes a base body defining a plurality of bays configured to retain the ferrite sleeves.
10. The plug-in connector as claimed in claim 9, wherein the base body also includes attachments with clamping protrusions that connect the front part to the rear part.
11. The plug-in connector as claimed in claim 1, wherein the plug-in connector housing forms a plug.
12. The plug-in connector as claimed in claim 1, wherein the second contacts include RJ contacts.
13. A plug-in connector for telecommunications and data technology for the purpose of connecting a symmetrical data cable, the plug-in connector comprising:
- an electrically insulating plug-in connector housing, and
- first contacts and second contacts positioned in the connector housing, the first contacts being configured to electrically connect to a plurality of core pairs of a symmetrical data cable, the second contacts being configured to electrically connect to contacts of a complementary plug-in connector,
- wherein two of the first contacts correspond to each core pair, and one second contact corresponds to each first contact, the first contacts being DC-connected to their corresponding second contacts,
- wherein one of a plurality of common-mode filter arrangements corresponds to each of the core pairs, wherein the common-mode filter arrangements are in the form of ferrite sleeves, wherein the ferrite sleeves are configured for each core pair to pass through the corresponding ferrite sleeve,
- wherein the ferrite sleeves are fixed as separate components to the plug-in connector housing, and
- wherein the ferrite sleeves are fixed to a ferrite sleeve holder held within the plug-in connector housing.
14. The plug-in connector as claimed in claim 13, wherein the holder is configured to hold four ferrite sleeves.
15. The plug-in connector as claimed in claim 13, wherein the ferrite sleeves held by the holder do not come into contact with each other.
16. The plug-in connector as claimed in claim 13, wherein the plug-in connector housing includes an upper part that is configured to latch to a lower part, and wherein the holder is held between the upper and lower parts.
17. The plug-in connector as claimed in claim 13, wherein the holder includes a front part and a rear part.
18. The plug-in connector as claimed in claim 17, wherein the front part of the holder includes a base body defining a plurality of bays configured to retain the ferrite sleeves.
19. The plug-in connector as claimed in claim 18, wherein the base body also includes attachments with clamping protrusions that connect the front part to the rear part.
5069641 | December 3, 1991 | Sakamoto et al. |
5456619 | October 10, 1995 | Belopolsky et al. |
5587884 | December 24, 1996 | Raman |
5628653 | May 13, 1997 | Haas et al. |
5766043 | June 16, 1998 | Talend |
5872492 | February 16, 1999 | Boutros |
5971813 | October 26, 1999 | Kunz et al. |
6062908 | May 16, 2000 | Jones |
6102741 | August 15, 2000 | Boutros et al. |
6276943 | August 21, 2001 | Boutros et al. |
6302741 | October 16, 2001 | Fasold et al. |
6319064 | November 20, 2001 | Belopolsky et al. |
6579116 | June 17, 2003 | Brennan et al. |
6663411 | December 16, 2003 | Little |
6837732 | January 4, 2005 | Pavlovic et al. |
6926558 | August 9, 2005 | Sasai et al. |
6953362 | October 11, 2005 | Mossner et al. |
7348862 | March 25, 2008 | Norte |
41 03 321 | August 1991 | DE |
195 00 295 | July 1996 | DE |
197 04 317 | September 1997 | DE |
298 19 314 | April 2000 | DE |
0 844 697 | May 1998 | EP |
WO 97/47083 | December 1997 | WO |
WO 02/15339 | February 2002 | WO |
WO 2006/078760 | July 2006 | WO |
Type: Grant
Filed: Jul 18, 2007
Date of Patent: Mar 29, 2011
Patent Publication Number: 20100003861
Assignee: ADC GmbH (Berlin)
Inventors: Ulrich Hetzer (Berlin), Frank Mössner (Berlin)
Primary Examiner: Briggitte R Hammond
Attorney: Merchant & Gould P.C.
Application Number: 12/376,013
International Classification: H01R 13/719 (20060101);